EndpointObjectHash.hpp

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/*
 * Copyright 2014 CyberVision, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ENDPOINT_OBJECT_HASH_HPP_
#define ENDPOINT_OBJECT_HASH_HPP_

#include <utility>
#include <cstring>

#include <botan/sha160.h>

#include <boost/cstdint.hpp>
#include <boost/shared_array.hpp>

namespace kaa {

typedef std::pair<boost::shared_array<boost::uint8_t>, boost::uint32_t> SharedDataBuffer;

class EndpointObjectHash : protected Botan::SHA_160 {
public:
    /*
     * Default constructor
     */
    EndpointObjectHash();

    /*
     * Specific constructors
     * Throws \ref KaaException when invalid data was passed (zero-sized or null buffer)
     */
    EndpointObjectHash(const std::string& str);
    EndpointObjectHash(const boost::uint8_t* data, const boost::uint32_t& dataSize);
    EndpointObjectHash(const SharedDataBuffer& endpointHash);
    EndpointObjectHash(EndpointObjectHash& endpointHash);

    /*
     * Copy operator
     * Throws \ref KaaException when invalid data was passed (zero-sized or null buffer)
     */
    EndpointObjectHash& operator=(EndpointObjectHash& endpointHash);

    SharedDataBuffer getHash();

    bool operator==(EndpointObjectHash& endpointHash) {
        return isEqual(getHash(), endpointHash.getHash());
    }

    bool operator!=(EndpointObjectHash& endpointHash) {
        return !isEqual(getHash(), endpointHash.getHash());
    }

    static bool isEqual(SharedDataBuffer left, SharedDataBuffer right);

    operator std::vector<boost::uint8_t>();

private:
    void clone(const boost::uint8_t* data, const boost::uint32_t& dataSize);

private:
    bool withData_;
    SharedDataBuffer hashBuffer_;
};

} /* namespace kaa */

#endif /* ENDPOINT_OBJECT_HASH_HPP_ */